Brown vat dye and process of making same.



I Saumur, dammi of' phihis QE VEN-Www i No. gummi.

imi aihim, sni'uhh-.s in. dihii'h mhh; mui. afihzi. iii. lumai, isi'gwthii; soi'wiitvs, Such :is micohni, dauin-i im fichi zu' henzm. .in hitheimlizile, quiiwiiii, :ii-mi miiiiii iiy is S''iziifingjiy sohihie in ii reddish brown sohiiiou. The s0- hitfioii in como: iwi sulfuric acid is "h1-uml.. With hy'dl'os'iiiiiw he ciy Stull yields a hmmm "m13 from which unimi; is dyed intima@ himvu hints. in, hoivh dyeing :find 'prin/sing, this iiya- Stiiii is hast asini is a paste auch as man. im Uh mined hy hiiuwii. methods, ih i* hibizii hy dissolving' thi. thfvsituii in mncentmimi sul i'ui'ic acid und siiiowiiug' the i h11i01i. to um into iev-w:ii/0i'y 0i' hy uhiwiiig nii' through an :iimlim sohiiyinh.

[ihn/mp1@ Il." l0 parte; uit di:unido-241Wihyi huihrziqiiiiioim, made :for instance hy the di'niti'iitiun, ni' Mi/1miiiyliiiiisiiiaquiuoue and suhsuqimnt :whim-thm wii'h smlium suiid, are Weii :mixed with 30 psi-rips of sulfur ami h@ mixture is hiid to 950-25500 C. foi som@ hours. From the 'cooled mui. powiiexed mass, the @Xmas of suiim is intimated h3? hail? ing with sociiuiifi siiiiid solution. The sidue ii ffii i Specification @i ie'btem EL3-aidant.

mi 1i, ma.

hiring :i hiack. poi i niii'oiwnzan-Q mii if $102.1, and im ci.

imihjctioil. with sa dimm suiihi, hmwd Wiih. 30 parts siliffui" ai, fifi- Q@ZSOO J, unifi?. cvfihiifion hydm-- glia suiii ha omas 'very slight, which hai pom zif'lifi 5%42 hows. The iiycstiii, irc-Gai. in h@ simi nimmer from excess of siufm, foi-ms a ihiiiii hiowi powder, dissolves in. con @unrated Suifuric acid. m n. violethiowu s0- utiou and in uiiiingg siiiuriu zic/iii criiiifiiniiig 2% 'pei' seht. 0i' suifui'iu ziiihyihhi, Ld zi gi'cii suhiticm. Ummm is dyed hy the dysstuii' iii :iikihii hydi'osuiiiv mit, heauiiui yeiimv brown tiuivs.

3 mami/111g ai 20H0 C., mmm- 01.' Lhamniml :3-

qiiimmws?Vias. Whifh cunsiss iii. heating; niiiisiirdorivzifi -metifiijhiiithifaqiiinmm sind oi its Sui'iiiiituzgifm products with Suiiiui' to :i high tiimpoi'atuie.

This Ciescrihmi pi'mess fin' 13h9- humiliant lvuic 0i hi'oiifii vail-;iyiiiuii's of the iinfthi'ziquiiiome-so. his h5' i'iiaating amid()-1nethyi mithmquimma, its nlkyi.- and zicidyldeiivatives, with Sulfur im n. high temperature.

Thi, ihsm'ii'mi piohess for thv, .iiifiiiiiiiziu- Lure 0i" brown witiysiifuli`s @i th@ anthrw quiliime-f-leiicis hy heating dimmiil0-2n10iiiy1- mithmqiiiiione, its aikyl- :md acidyhimivaihres with siiifizi' 'to n high temperziti-i'c,

1i. As 119W piothicts, the vatf-dyesuis, ohtiiiimbie hy heating amiihi-derivatives oi" 2\methyimiimmquinone sind its Subsitiiwutii 'pigiducta with sulfur to il, high tempfatum,

constituting, Vin dry state, dark Ibrown to black powders, soluble in concentrated suliuric acid to brown to violet-brown solutions,

insoluble in alcohol, glacial acetic acid and benzene, and yielding with alkaline reducing agents brown to violet vats dyeing uninordanted cotton yellowish brown to violetbrown tints fast to washing and light.

5;As new products, thc vat-dyes, obtainable by heating amido-2-rnethylanthraquinone, its allryland acidylderivatives with sulfur to a high temperature, constituting, in

` dry state, dark brown to black powders, soluble in concentrated sulfuric acid with a brown to violet-brown coloration, insoluble in alcohol, glacial acetic acid and benzene and yielding with alkaline reducing agents brown to violet vate dyeing unmordantcd cotton yello'wisli-biown to violet-brown tints.

As new products, of manufacture the vatdyes, obtainable by heating diamido-2- methylanthraquinone, its alkyland acidylderivatives with sulfur to a high temperature, constituting, in dr state, dark brown to black powders, solu le in concentrated sulfuric acid With a brown to violet-brown coloration, insoluble in alcohol, glacial acetic acid and benzene, and yielding with alkaline reducing agents brown to violet-brown vats dyeing unmordanted cotton from yellowish brown to violet-brown tints.

In witness whereof we have hereunto signed our names this 29th day of July 1908, in the presence of two subscribing witnesses.

ALFRED SCHAARSCH MIDT. BERTRAM MAYER.

Witnesses:

GEO. GIFFORD, ERNST WAGNER. 

